Quercus persica and Pistacia mutica are two known and prevalent forest trees of Baneh and Marivan from Kurdistan province (W Iran). Thirty-five fungal isolates were obtained from 50 bark samples of Q. persica collected in Sept. and Mar. 2010–11. The aim of this study was to identify fungi associated with oak trees of Kurdistan province. Based on morphological features and authentic keys (Ellis 1976, Sivanesan 1987), 15 isolates were identified as Drechslera triseptata that is reported as a new taxon to the mycobiota of Iran.